Improvement in automatic gates



1. ELLIS.

Automatic Gates.

wnuess: V I 25 I ATTUBNEYS.

THE GRAPHIC C(LFHDTCI -LITH.353 4| PARK PLACEINK UNITED STATES PATENTQFFICE.

JEFFERSON ELLIS, OF DETROIT, MICHIGAN.

IMPROVEMENT IN AUTOMATIC GATES.

Specification forming part of Letters Patent No. 153,936, dated August11, 1874; application filed June 26, 1874.

To all whom it may concern Be it known that I, JEFFERSON ELLIs, ofDetroit, in the county of Wayne and State of Michigan, have invented anew and useful Improvement in Automatic Gate, of which the following isa specification:

Figure 1 is a vertical cross-section of my improved gate, part beingshown in a closed, and part in an open, position, taken through the linemum of Fig. 2. Fig. 2 is avertical longit-udinal section of the same,taken through the line y 3 Fig. 1.

Similar letters of reference indicate corresponding parts.

The invention will first be fully described, and then pointed out in theclaim.

A represents the base of the gate, which may be a platform or frameembedded in the ground. 13 are two inclined platforms, the outer edgesof which are hinged or pivoted to the outer parts of the base A, andtheir inner edges rest upon a cross-bar, O, the ends of which move upand down between standards D attached to the middle parts of the sidesof the baseA. The cross-barG rests upon springs E, which should beofsuch a strength as to raise and support the cross-bar C and theplatforms B, except when pressed down by the weight of the'horse orcarriage approaching and passingthrough the gate. To the ends of thecross-bar O are attached the lower ends of two upwardly-projectin gbars, F, upon the inner sides of which are formed teeth, into which meshthe teeth of the gear-wheels, or segments of gear-wheels G, rigidlyattached to the lower outer corners of the gates or wings H, which wingsare pivoted at said lower outer corners to two of the standards D.

By this construction, when the platforms B and cross-bar G are forceddownward by the weight of a horse, carriage, or other object passingupon them, the downward movement of the rack-bars F will turn thegear-wheels or segments G, and thus raise or open the gate H, which gatewill he held raised until the platforms are released from the depressingweight, when the elasticity of the springs E will raise the cross-bar Gand platforms B to their former position, closing the gate.

The gate may be made wide or narrow, double or single, as may bedesired, and may be made to be operated by a heavy or light weight, asits position may require.

Having thus described my invention, I claim as new and desire to secureby Letters Patent The cross-bar 0, supported on springs and providedwith vertical racks F, combined with gate-sections H, having partpinions G, as and for the purpose specified.

JEFFERSON ELLIS.

Witnesses:

E. R. ELLIS, JOHN LASHBROOK.

